[Webkit-unassigned] [Bug 96187] New: Poor tiled image performance on Retina displays

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=96187

           Summary: Poor tiled image performance on Retina displays
           Product: WebKit
           Version: 420+
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Images
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: pdr at google.com


Created an attachment (id=162969)
 --> (https://bugs.webkit.org/attachment.cgi?id=162969&action=review)
Testcase

Open the attached testcase and scroll so that at least two "tiles" of the background image are visible.

On Chromium, once we hit the Skia's Image::drawPattern codepath we end up AWESOME resampling on every repaint which pretty much hangs the browser. The Safari port performs slightly better but not acceptably so.

I originally hit this on an HP website for the Z620 but I imagine this is a common issue.

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